Harris County ranks third in the nation’s most populous counties, according to estimates released by the U.S. Census Bureau April 18. The county is estimated to have had a population of 4,698,619 in July 2018, compared to 4,664,159 in July 2017. That growth puts it at No. 3 in the nation for highest numeric growth from 2017 to 2018, behind Clark County in Nevada and Maricopa County in Arizona, which ranks No. 1. Harris County also ranks number one in numeric growth from 2010 to 2018, from an estimated base of 4,093,188 in April 1, 2010. The Houston-The Woodlands-Sugar Land metropolitan ranks number 5 in most populous metropolitan areas, with an estimated population of 6,997,384 in July 1, 2018. The estimated population for July 1, 2017 was 6,905,695, and 5,920,487 in April 1, 2010.